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Paul Grainger

DME connections for PSE

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Does anyone know which connections are used on the engine ECU (2002 996 3.6) in order to operate the PSE at high road speeds only?

i have a retrofitted exhaust system with vacuum operated bypass which is currently controlled by a switch - but when it is turned on it is 'permanently on' even at low speeds. I want to connect the exhaust such that the system only operates at higher speeds as with the OEM system. Any help would be much appreciated 

Paul G

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The PSE gets a speed signal from the instrument cluster. To my knowledge this is set permanently in the cluster firmware and can not be changed.

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Loren - thanks for replying. Do you have a circuit diagram for this? I've searched and have not been able to find anything.

thanks

Paul G

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Yes but I doubt that will do you any good it is just one (of many) that go into the instrument cluster. And as I said the trigger speed is programmed into the cluster.

 

The wire connects at B13 connector pin and is labeled "Speedometer A". The wire is Gray/Pink.

 

speedometer a.png

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The genuine PSE uses a relay connected to the grey/pink speed wire on the jumper plug on Loren's image. I don't see why you couldn't fit the PSE relay, and wire it up to your system. I don't think you would be able to adjust the cutout speed range though.

 

I have some additional information about the system which may be of use.  Drop me a PM with your email address and I'll send it to you in the morning when I get to my PC.

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